// Tests for parseQueryLog edge cases
    // ============================================================

    @Test
    public void test_parseQueryLog_emptyQueryString() throws Exception {
        QueryLog queryLog = new QueryLog("", null);
        List<SuggestItem> items =

        } catch (final IOException e) {
            throw new SuggesterException("Failed to create SuggestItem from search words.", e);
        }
    }

    @Override
    public List<SuggestItem> parseQueryLog(final QueryLog queryLog, final String[] fields, final String[] tagFieldNames,
            final String roleFieldName, final ReadingConverter readingConverter, final Normalizer normalizer) {

            if (parallel) {
                stream = stream.parallel();
            }
            final SuggestItem[] array =
                    stream.flatMap(queryLog -> contentsParser
                            .parseQueryLog(queryLog, ctx.getSupportedFields(), ctx.getTagFieldNames(), ctx.getRoleFieldName(),
                                    readingConverter, normalizer)
                            .stream()).toArray(SuggestItem[]::new);

    }

    @Test
    public void test_parseQueryLog() throws Exception {

        QueryLog queryLog = new QueryLog("content:検索エンジン", null);
        List<SuggestItem> items = defaultContentsParser.parseQueryLog(queryLog, supportedFields, tagFieldNames, roleFieldName,
                createDefaultReadingConverter(), createDefaultNormalizer());
        SuggestItem item = items.get(0);
        assertEquals("検索エンジン", item.getText());